Adjustable lane assembly

ABSTRACT

A packaging machine ( 10 ) includes a lane assembly ( 12 ) that includes one or more lanes (L) which guide cylindrical articles (B), such as cans or bottles, across a series of substantially parallel conveyors. The lane assembly ( 12 ) includes an adjustable guide bar ( 34 ) which defines an adjustable portion (V) of the lane (L) that can be adjusted to adapt to the diameter of articles (B). The lane assembly ( 12 ) also includes lane extensions ( 70 ) that can be adjusted to control the position of rows of articles (B) as the articles (B) exit the lanes (L) onto a conveyor ( 20 ).

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to U.S. Provisional Application No.60/745,996, filed Apr. 28, 2006, the entirety of which is incorporatedherein by reference.

TECHNICAL FIELD

This invention relates generally to packaging machinery and systems, andmore specifically to a packaging machine with an adjustable laneassembly for accommodating articles for various sizes.

BACKGROUND OF THE INVENTION

Many packaging machines include several conveyors that underlie multiplelanes which direct cylindrical articles, such as bottles or cans, acrossconveyors in the process of grouping and packaging the articles. Forexample, articles are commonly brought into the packaging machine via aninfeed conveyor that feeds the articles to a metering chain, whichprovides a timing function and buffers the relatively high infeed linepressure. Upon exiting the metering chain, which may in essence be alinear star wheel, the articles in a single lane tend to be somewhatstaggered as they transition onto a grouping conveyor. One purpose ofthe grouping conveyor is to order the articles into a substantiallysingle file, and so, it is desirable for the width of each lane to beonly slightly greater the diameter of articles before the articles exitthe grouping conveyor. The articles are thereby predictably arranged,for example, to facilitate separating the articles into groups on apocket conveyor that awaits downstream and to prevent unnecessarywobbling or ether variance in trajectory that increases the likelihoodof damaging the articles.

Packaging machines generally do not have the flexibility to“changeover,” that is to be reconfigured between runs to group articlesthat vary in size or diameter. Given the size, cost, and complexity ofthese machines, this lack of versatility is expensive. Therefore, it isadvantageous to design machines which are as adaptable as possible.

It is desirable for such a packaging machine to have the ability toprocess articles of different diameters. For example, it is desired thatthe packaging machine can accommodate a first run of articles having afirst diameter and can be changed over to accommodate a second run ofarticles having a second diameter that differ from the first diameter.

To group and package articles of different diameters, previous packagingmachine designs allow for the installation of a lane insert that ismounted to one of the walls of the lane. The lane insert narrows thewidth of at least a portion of the length of the lane to correspond tothe desired article diameter plus an allowable tolerance. Thereby thenarrow portion of the lane orders the articles in a single file linewith predictable distances between the centers of the articles. Thispredictable arrangement prepares the articles for engagement by lugs ona metering conveyor. The lane inserts are removable and typically can beinterchanged with lane inserts of a different thickness to adjust forarticles of different diameters. However, interchanging lane inserts isa time consuming process and it is impractical to have a set of laneinserts corresponding to every possible diameter of article to bepackaged.

Articles can also be damaged upon leaving the lanes, if the articles arenot deposited on the next conveyor in an orderly fashion. Typically, theoutfeed ends of the lanes have been aligned with an edge of the pocketconveyor such that each row of articles exiting the lanes is moved orpushed onto the pocket conveyor by an incoming row of articles, therebydefining a matrix like group of articles. Each additional incoming rowof articles must push with increasing force to move the previouslyformed rows of the group. In this arrangement, articles of any diameterwith even a minimal gap between rows and articles may damage one anotherwhen pushing each other onto the pocket conveyor. For example, adhesivelabels or directly deposited graphics may be scuffed or otherwisedamaged.

To address this shortcoming, certain other lane assemblies extend theoutfeed ends of the lane assembly a fixed distance over the pocketconveyor such that the rows of articles do not push against one anotherwhen exiting the pocket conveyor. However, if such a lane assembly isutilized in a packaging machine that can be changed over to processarticles of various diameters, the gap between rows of articles of afirst diameter will differ from that of articles of a second diameter sothere will not be a tight and orderly formation of grouped articles. Itis desirable to minimize potential damage by controlling the spacing ofarticles as they exit the lanes onto the pocket conveyor.

Therefore, a heretofore unaddressed need exists in the industry for alane assembly that is easily and selectively adjustable to vary thewidth of the lane according to the diameter of the article and tocontrol the position of and gap between rows of articles exiting thelanes.

SUMMARY OF THE INVENTION

The present addresses the aforementioned shortcomings in the prior artby providing a lane assembly for a packaging machine that can be easilyadjusted to facilitate fast and efficient changeover, as well as theadded advantage of increasing the level of flow control by incorporatinga cycle stop feature.

The various embodiments of the invention will be described, and areparticularly applicable in the context of a packaging machine havingmultiple lanes for guiding articles, such as bottles or cans. Each laneis defined at least in part by an inside lane guide and an outside laneguide that are spaced apart to define a fixed width.

Generally described, the lane assembly of the present invention iscapable of being adjusted for changeover and flow control by providingmeans for selectively and reversibly varying the width of at least aportion of each lane, means for adjustably diverting or blocking theflow of articles in each lane, and varying the degree to which theoutfeed ends of the lane assembly extend over the pocket conveyor. Theadjustments can be performed automatically or manually by an operatorwithout the need for substituting parts or directly accessing areas ofthe packaging machine that are relatively difficult to access.

More specifically, the various embodiments of the lane assembly includemultiple lanes each having any or all of the following elements: anadjustable guide, a pivotable transition gate, and extendable laneextensions. Each of these elements is adjustably operatively associatedwith a lane defined in part by an inside lane guide and an outside lineguide. The elements are duplicated for each line.

An adjustable guide is adjustably mounted within each of the lanes, andpreferably within a relatively downstream portion of the lanes that isbiased with respect to the direction of flow in which an underlyingconveyor is driving the articles. More precisely, the adjustable guideis located at a point at which it is desirable to ensure that thearticles in any one lane are in a single file. At this point,adjustability is desired to define the single file of articles whileproviding the optimal amount of play to ensure that the articles flowfreely with minimal damage. This optimization is desirable regardless ofthe size of article that is traveling down the lane in a particular run.To supply this flexibility, the adjustable guide is capable of variablyand reversibly extending into the lane to translate or extend to narrowand define an adjustable width portion of the lane as needed to conformto the article diameter.

At any point in time, the adjustable width portion has an adjusted widththat is no greater than the fixed width of the remainder of the lane.When fully retracted, the adjustable guide does not substantiallyprotrude into the lane, thereby permitting orderly passage of thelargest articles that the packaging is intended to process. When fullyextended, the adjustable guide protrudes into the lane so as to permitorderly passage of the smallest diameter articles that the packaging isintended to process. The adjustable guide can be incrementally extendedor retracted to permit orderly passage of articles of any diametertherebetween. In certain embodiments, the adjustable guide comprises anelongated bar that is extendable toward the outside lane guide andretractable toward the inside lane guide, wherein when fully retracted,the adjustable guide is spaced apart from the outside lane guide by atleast the width of the fixed width portion of the lane. In certainembodiments, the adjustable guide extends through a void in one wall ofthe lane and toward the opposite wall.

The pivotable transition gate functions to transition articles from theupstream fixed width portion of the lane to the adjustable width portionof the lane so that the adjustable guide does not abruptly change thewidth of the lane so as to impede the rate of flow. In other words, thetransition gate ramps the articles to the narrowed portion of the laneby gradually guiding the articles from the fixed width portion to saidadjustable width portion of the lane. Its fixed end is mounted upstreamof the adjustable guide and its free end is normally directed generallytoward the outfeed end of the lane. The free end is adjacent to saidtransition guide and can variably swivel into the lane to divert thearticles so that they flow easily and fluidly into the narrowed portionof the lane when machine is set up to run smaller articles. Thepivotable transition gate has a range of motion and a control mechanismthat provides an unlimited number of operating positions. To permitunfettered passage of the largest articles that the packaging isintended to process, the transition gate is substantially fully opened,that is, flush with a wall of the lane so as to be substantiallycoplanar with a first plane defined by the inside lane guide. Tocompletely staunch the flow of articles, the transition gate pivots toits maximum extent, thereby defining a prime-clear position at whichpoint it may be perpendicular to the lane. When the adjustable guideprotrudes into the lane, the transition gate is pivots to the extentnecessary to divert the articles past the upstream edge of theadjustable guide, thereby defining one of infinitely numerous possiblerunning positions.

The transition gate is variably pivotally moveable between the fullyopened position and a running position at which the contact surface isat an acute angle with respect to the first plane. To completely blockthe flow, the transition gate is also pivots in a single motion fromeither the fully opened position or any possible running position to theprime-clear position at the extreme of the angular range defined by theinside guide.

As noted above, the packaging machine includes multiple lanes eachincluding at least one of the adjustable guide, the pivotable transitiongate, and the extendable lane extensions. According to one aspect of theinvention, all of these elements may be manually or automaticallyadjustable, and each group of like elements may be adjusted or operatedin unison. The disparate groups of elements may also be synchronizedsuch that for an article of given size, all adjustable guides, pivotabletransition gates, and lane extensions are adjusted at once or in achoreographed fashion. Manual adjustments may be made by mechanicalmeans such as crank wheels, spring loaded detent pins, and thumb screws.Automatic adjustments may be made using electromechanical means such aspneumatic devices, electromagnets, and motors. Automatic adjustments maybe effected via human interaction with an input device such as a pushbutton or switch, or via electronic control devices such as programmablelogic controllers (PLCs).

The lane extensions extend and retract from the downstream ends of atleast one of a pair of lane dividers that define the lane guides of eachlane to control the position and compactness of groups of articles thatare formed as the articles leave the lanes.

The foregoing has broadly outlined some of the aspects and features ofthe present invention, which should be construed to be merelyillustrative of various potential applications of the invention. Otherbeneficial results can be obtained by applying the disclosed informationin a different manner or by combining various aspects of the disclosedembodiments. Accordingly, other aspects and a more comprehensiveunderstanding of the invention may be obtained by referring to thedetailed description of the exemplary embodiments taken in conjunctionwith the accompanying drawings, in addition to the scope of theinvention defined by the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial plan view of an embodiment of an exemplary packagingmachine, according to the present invention.

FIG. 2 is a partial plan view of a lane of the exemplary packagingmachine of FIG. 1.

FIG. 3 is a partial perspective view of an exemplary guide bar assemblyof the packaging machine of FIG. 1.

FIG. 4 is a partial exploded view of the guide bar assembly of FIG. 3.

FIG. 5-7 are partial plan views of the lane of FIG. 2 showing operationof a transition gate and a guide bar.

FIG. 8 is a partial perspective view of an embodiment of an exemplarycontrol system for the transition gate of FIGS. 5-7, according to thepresent invention.

FIG. 9 is a side elevation of the control system of FIG. 8.

FIG. 10 is an end elevation view of the control system of FIG. 8.

FIG. 11 is a partial plan view of the control system of FIG. 8.

FIG. 12 is a partial perspective view of the outfeed end of a lane ofthe packaging machine of FIG. 1 showing an embodiment of an exemplarylane extension, according to the present invention.

FIG. 13 is a partial plan view of the outfeed ends of the lanes of thepackaging machine of FIG. 1, the lane extensions being fully retracted.

FIG. 14 is a partial plan view of the outfeed ends of the lanes of thepackaging machine of FIG. 1 showing certain lane extension beingextended in an exemplary arrangement.

FIGS. 15 and 16 are partial plan views of the outfeed ends of the lanesof the packaging machine of FIG. 1 showing certain lane extensions beingextended in alternative arrangements.

DETAILED DESCRIPTION

As required, detailed embodiments of the present invention are disclosedherein. It must be understood that the disclosed embodiments are merelyexemplary of the invention that may be embodied in various andalternative forms, and combinations thereof. As used herein, the word“exemplary” is used expansively to refer to embodiments that serve asillustrations, specimens, models, or patterns. The figures are notnecessarily to scale and some features may be exaggerated or minimizedto show details of particular components. In other instances, well-knowncomponents, systems, materials, or methods have not been described indetail in order to avoid obscuring the present invention. Therefore,specific structural and functional details disclosed herein are not tobe interpreted as limiting, but merely as a basis for the claims and asa representative basis for teaching one skilled in the art to variouslyemploy the present invention.

Referring now to the drawings, wherein like numerals indicate likeelements throughout the several views, the drawings illustrate certainof the various aspects of an exemplary embodiment of a packaging machine10, as shown in FIG. 1. Generally described, the packaging machine 10includes a lane assembly 12 that includes lanes L which guidecylindrical articles B, such as cans or bottles, across a series ofsubstantially parallel conveyors, which support the articles B and movethe articles B in a flow direction F. Certain of the conveyors includelugs that contact certain articles B that are traveling in the lanes toseparate the articles B into groups.

Referring to FIG. 1, the exemplary packaging machine 10 includes threelanes L1, L2, L3 and three streams of articles B1, B2, B3 that follow apath through respective ones of the lanes L1, L2, L3. For purposes ofteaching, letters “B” will be used to refer generally to certain or allof the articles B1, B2, B3 and the letter “L” will be used to refergenerally to certain or all of the lanes L1, L2, L3.

The lane assembly 12 includes certain features which provide that thelanes L can be configured to adapt to the diameter of an article B thatfalls within a selected range of article diameters. Specifically, thefeatures of the lane assembly 12 provide that the articles are alignedso as to be predictably positioned within the lanes L and that thearticles B are controllably arranged as the articles B exit the lanes L.

The terms “upstream”, “downstream”, “trailing”, and “leading” are usedherein with respect to the flow direction F and to the path of thearticles or the path defined by the lane L. The terms can be used todescribe the direction of movement of elements or to describe therelative position of elements with respect to one another. Specifically,the terms “upstream” and “downstream” can refer to elements having fixedpositions, for example, where a downstream element is positioned at adistance in the flow direction F from an upstream element. Downstreammovement is movement in the flow direction F and upstream movement ismovement opposite the flow direction F. Further, the terms “leading” and“trailing” can refer to elements that are moving in the flow directionF, for example, where the leading element is further along in the flowdirection F than the trailing element.

The terms “longitudinal” and “transverse” are used herein to describemovement or alignment with respect to the lane path or article path.Specifically, the term longitudinal can be used to describe movement oralignment with the lane path or article path and the term transverse canbe used to describe movement or alignment that is substantiallyperpendicular to the lane path or article path. The lanes L at leastpartially define the path of the articles B therethrough.

Referring to FIG. 1, the series of parallel conveyors of the packagingmachine 10 may include infeed conveyors, metering conveyors, groupingconveyors, pocket conveyors, bridge conveyors, carton conveyors, and thelike. In the exemplary embodiment, the packaging machine 10 includes aninfeed conveyor 14 that supports and transports the articles B throughthe most upstream length of the lanes L and establishes back pressure tokeep the articles B moving through lanes L. The packaging machine 10also includes a metering conveyor 16 that includes attached lugs G1,which separate or meter articles B from the articles B in the mostupstream length of the lanes L. Thereby, consistent and repeatablespacing is established between the articles B in each lane L downstreamof the metering conveyor 16. Further, surging and back pressure that iscaused by the articles B pushing one another through the lanes L isrelieved by the metering conveyor 16. Thus, the metered articles B arepredictably positioned to be grouped as the metered articles B exit themetering conveyor 16 and enter a grouping conveyor 18, which includesgrouping or separating devices such as lugs G2. Once the articles B areseparated into groups within the lanes L by the grouping conveyor 18,the articles B exit the outfeed ends O of the lanes L onto a pocketconveyor 20, which includes grouping or separating devices such as lugsG3, and the groups in each lane are combined into a larger group that isto be loaded into a carton on a carton conveyor 90.

It should be understood that the speed of the metering conveyor 16relative to that of the grouping conveyor 18 determines the number ofarticles B disposed in each row or group of articles B that exits theoutfeed end O of each lane L. The metering conveyor 16 can move at aspeed that is slower than, faster than, or equal to that of the groupingconveyor 18 to alter the configuration of a group of articles B disposedon the pocket conveyor 20.

In the exemplary embodiment, each lane L includes a substantiallystraight upstream portion, which is substantially parallel to the flowdirection F, and a biased or otherwise angled downstream portion, whichis at an angle A1 with respect to the flow direction F. The angledportion of each lane L guides articles B from the infeed conveyor 14across the metering conveyor 16, grouping conveyor 18, and onto thepocket conveyor 20. The lanes L can be characterized or distinguishedfrom one another in that articles B3 in the innermost lane L3 have theshortest path through the lane assembly 12 before encountering themetering conveyor 16. Conversely, articles B1 in the outermost lane L1have the longest path through the lane assembly 12 before encounteringthe metering conveyor 16.

For clarity, a single lane L is shown in FIGS. 2 and 5-7 and describedbelow. The lanes L of the lane assembly 12 are substantially similarsuch that the description of one lane L is generally applicable to allthe lanes L of the lane assembly 12.

In general, a single run of articles B though the packaging machine 10will involve substantially identical articles B having the same firstdiameter. A subsequent run may involve substantially identical articlesB having a second diameter that is less than or greater than the firstdiameter. Therefore, the width of a portion of each lane L in the laneassembly 12 is accordingly adjusted, preferably between runs, asdescribed below, it is also contemplated that a single run may involvearticles B that vary in diameter, for example, in a process where avariety pack of disparate articles B are packaged. In such embodiments,the lane assembly 12 is adjusted on the fly.

Referring to FIG. 2, each lane L of the lane assembly 12 is defined byinside and outside lane guides 32, 33 and is adjustable to accommodatecylindrical articles B of various diameters ranging from a smallestdiameter to a largest diameter. The inside lane guide 32 of one lane Lis spaced apart from an outside lane guide 33 of an adjacent lane L. Aspace is provided between the inner and outer lane guides 32, 33 ofadjacent lanes L to facilitate the inclusion of elements that define anadjustable portion V of each lane L, as described in further detailbelow.

The width W1 of a fixed portion of each lane L is defined between theoutside lane guide 33 and the inside lane guide 32. In the angledportion of each lane L, articles B are generally held against anddeflected by the outside lane guide 33 since the infeed conveyor 14 thatdrives the articles B moves in the flow direction F. The lane width W1is defined by or is a function of the largest diameter of articles B tobe handled in the lane assembly 12, with an allowance for a desiredtolerance to reduce friction.

Each lane L further includes elements that define an adjustable portionV thereof along which the centers of articles B are substantiallyaligned so as to be engaged by the metering conveyor 16. Referring toFIGS. 2-4, the adjustable portion V of each lane L is defined by anadjustable guide bar 34 that is disposed opposite, and parallel to, aportion of the outside lane guide 33.

Referring to FIGS. 3 and 4, each guide bar 34 is part of a guide barassembly 21 that facilitates adjusting the transverse position of theguide bar 34. The guide bar assembly 21 includes a support member 22, athreaded anchor panel 24, and the adjustable guide bar 34. The guide barassembly 21 is assembled by inserting bolts 26 through bolt holes (bestshown in FIG. 4) in the support member 22 and through slots 28 in theadjustable guide bar 34. The bolts 26 are secured in threaded holes inthe threaded anchor panel 24. The support member 22 is secured to theouter lane guide 33 for each lane L. The adjustable guide bar 34 can beadjusted by loosening the bolts 26 and translating the adjustable guidebar 34 relative to the support member 22, as allowed by the slots 28. Inthe exemplary embodiment, the bolt holes in the support member 22 aredefined by recesses in an edge of the support member 22 and a portion ofthe inside lane guide 32. Specifically, the portion of the inside laneguide 32 closes an open side of the recesses to form the bolt holes.

Referring to FIGS. 2, 3 and 5-7, the adjustable guide bar 34 can betransversely positioned relative to the outside lane guide 33 to definea adjusted width W2 that is equal to or less than the lane width W1. Theadjusted width W2 can be adjusted to correspond to articles B with adiameter that is between the largest diameter and the smallest diameter,inclusive. For example, referring to FIG. 5, if the articles B to behandled in the lane assembly 12 have a larger diameter D2, the insidesurface of the adjustable guide bar 34 can be adjusted to besubstantially coplanar with a plane P1. The plane P1 is defined by theinside surface of the angled portion of the inside lane guide 32. Inthis arrangement, the width W2 is substantially equal to the width W1.Referring to FIG. 6, for an article with a smaller diameter D1, which isless than the larger diameter D2, the adjustable guide bar 34 isadjusted such that the contacting surface of the adjustable guide bar 34is offset from the plane P1 by an offset distance S and is parallel tothe plane P1.

Referring again to FIG. 2, a transition gate 36 is positioned to beadjacent to the upstream end of the adjustable guide bar 34. Thetransition gate 36 includes a vertical shaft 38 and a pair of horizontalarms 40 (shown in FIGS. 8-10) that are fixedly mounted to, and extendaway from, the shaft 38. The shaft 38, which defines the pivot axis ofthe arms 40, is rotatable to move the arms 40 from a fully openedposition (shown in FIG. 5) where the engaging surface U of each of thearms 40 is substantially coplanar with the plane P1 to a running orprime-clear position (shown in FIGS. 6 and 7, respectively) where theengaging surface U of each of the arms 40 is at an angle with respect tothe plane P1.

Optionally, in the exemplary embodiment, each transition gate 36includes two arms 40. Referring momentarily to FIGS. 8 and 9, theposition or elevation of each of the two arms 40 of the transition gate36 has been optimized so that the transition gate 36 engages an articleB, such as a bottle, above and below the label and, in doing so, doesnot damage the label of the bottle. Specifically, the upper arm 40 ismanually adjustable to align with and engage the shoulder of the bottleand the lower arm 40 is fixed so as to align with and engage the heel ofthe bottle. Alternatively, either or both of the arms 40 can be fixed oradjustable.

Rotating or pivotally moving the distal ends the arms 40 into the lane Lprovides multiple functions. As mentioned above, the adjustable guidebar 34 can be transversely positioned such that the width W2 of theadjustable portion V of the lane L is less than the width W1 of thefixed portion of the lane L. However, transversely positioning theadjustable guide bar 34 such that it is offset from the plane P1 by anoffset distance S has the potential to create an obstruction in the laneL at the upstream end of the adjustable portion V of the lane L. Inother words, the sharp transition in the width of the lane L, from widthW1 to width W2, can obstruct the flow of articles B, which can becomestuck in the lane L upon encountering the sharp transition.

Referring to FIG. 6, each of the arms 40 can be rotated to a runningposition where the engaging surfaces U of the arms 40 defines an angleA2 with respect to the plane F1 and provide a transition surface or rampbetween the vertical contact surface of the inside lane guide 32 and thevertical contacting surface of the adjustable guide bar 34. The lengthof each arm 40 is such that a free or distal end Q thereof extendssubstantially to the potentially obstructing corner or edge of theadjustable guide bar 34 when the arms 40 are in the running position. Inthis fashion, a gap between the distal end Q of the arms 40 and thepotentially obstructing portion of the adjustable guide bar 34 iseliminated. To provide a transition surface or ramp, the distal end Q ofeach arm 40 may be somewhat offset from, if not exactly in, the planedefined by the vertical contacting surface of the adjustable guide bar34, as viewed in FIG. 6. The elevation of each arm 40 may be higher orlower than that of the adjustable guide 34, for example, to prevent thearms 40 from contacting the adjustable guide bar 34.

Referring to FIG. 7, each of the arms 40 can be rotated to theprime-clear position where the engaging surfaces U define an angle A3with respect to the plane P1 and the distal end Q of each arm 40 is adistance X from the outside lane guide 33. The distance X is generallyselected to be less than the smallest diameter of articles B handled bythe lane assembly 12 such that the transition gate 36 stops articles Bhaving any diameter D, in the range from the smallest diameter to thelargest diameter, from traveling in the lane L. The transition gate 36may stop articles B from traveling in the lane L before beginning a run,at the end of a run, or upon identification by a processing means, suchas a programmable logic controller (PLC) 41, of a fault conditiondetected by a sensor R. The PLC 41 is described in further detail below.Those skilled in the art will recognize that, to stop the flow ofarticles B, the distance X can be any value that is less than thediameter D of articles B that are currently being run through the laneL.

Referring to FIGS. 8-11 an adjustment system 42 controls the rotation ofthe transition gates 36 into the lanes L. The adjustment system 42includes multiple mechanisms for rotating the gates 36. In the exemplaryembodiment, a first mechanism facilitates rotation or pivotal movementof the arms 40 to a running position while a second mechanismfacilitates rotation or pivotal movement of the arms 40 to theprime-clear position from the fully opened position or any of apotentially infinite number of running positions.

Referring to FIGS. 8-11, the adjustment system 42 includes a C-shapedframe 44 that is suspended above the lanes L by columns mounted to theframe (not shown) of the packaging machine 10. A plate 48 is disposedalongside the inside surface of the vertical portion of the frame 44. Anod 50 (shown in FIGS. 9, 10 and 11) is disposed alongside the outsidesurface of the vertical portion of the frame 44. Bearing blocks 52(shown in FIGS. 9, 10 and 11), are slidably mounted to the frame 44through slots 49 (shown in FIG. 11) in the vertical portion of the frame44, which facilitate sliding movement along the length of the frame 44.Each bearing block 52 is slidably connected to the rod 50 and fixedlyconnected to the plate 43. As best shown in FIGS. 9-11, a pair of clampcollars 51, 51 is fixedly mounted to the rod 50 on opposite sides ofeach bearing block 52 such that, when the rod 50 moves one way or theother along the length of the frame 44, the bearing blocks 52 move alongwith the rod 50. As a result, the rod 50, the bearing blocks 52, and theplate 48 move as one and longitudinally translate along the length ofthe frame 44.

The upper end of each shaft 38 is supported by a rotational bearing 53(shown in FIG. 10) that is received in a circular aperture in the lowerhorizontal portion of the frame 44. The lower end of each shaft 38 canbe supported by a bearing block (not shown), which is mounted in thespace between lanes L and adjacent to the upstream end of the adjustableguide bar 34. Referring to FIG. 11, an arcuate slot 54 is defined in thelower horizontal portion of the frame 44. The arcuate slot 54 isadjacent to the upper end of each shaft 38. The arcuate slot 54 and thecircular aperture have substantially the same center point C, whichdefines the axis of rotation of the shaft 38.

Referring to FIG. 11, the proximal end of a pivoting lever 56 is fixedlyattached to the upper end of each shaft 38. The proximal end of an aircylinder 58 is pivotally mounted to the plate 48 by a trunnion clevis 59and the distal end of the air cylinder 58 is pivotally connected to thedistal end of the pivoting lever 56 by a shoulder screw 60. The lowerend of the shoulder screw 60 extends into the arcuate slot 54. Thereby,the shoulder screw 60 cooperates with the arcuate slot 54 to limit therotational movement of the pivoting lever 56 within the angular range,which relates to the measure of the angle A3, defined by the arcuateslot 54. Thus, the rotation of the shaft 38 and the gate 38 is alsolimited to the angular range A3 due to the limited movement of theshoulder screw 60 within the arcuate slot 54.

Exemplary operations of the adjustment system 42 are now described forpurposes of teaching. While the plunger 57 of the air cylinder 58 isfully retracted, the rod 50 may be moved along the length of the frame44 to change the position of the shoulder screw 60 along the length ofthe arcuate slot 54 and thereby control the angular position of theassociated arms 40. For example, when the rod 50 is moved to the rightfrom the position shown in FIG. 11 to take a fully retracted position(not shown), the shoulder screw 60 is moved to the first end N1 of thearcuate slot 54 whereupon the engaging surface U of each of the arms 40is substantially coplanar with the plane P1. When the rod 50 is movedfrom the fully retracted position to a partially or fully extendedposition, as shown in FIG. 11, the shoulder screw 60 moves an angulardistance defined by an angle A2 from the first end N1 to an intermediateposition between first and second ends N1 and N2 of the arcuate slot 54.When the shoulder screw 60 is positioned such that the pivoting lever 56is rotated to the angle A2, with respect to the first end N1, theengaging surface U of each of the arms 40 is at an angle A2 with respectto the plane P1.

The air cylinder 58 may be extended when the rod 50 is at any positionincluding a fully retracted position and a partially extended position.By extending the plunger 57 of the air cylinder 58, the shoulder screw60 is moved to the second end N2 of the arcuate slot 54 whereupon theengaging surface U of each arm 40 takes the prime-clear position at anangle A3 with respect to the plane P1. The extended length of the aircylinder 58 (or the range of the movement of the cylinder plunger 57) issufficient to move the shoulder screw 60 from the first end N1 to thesecond end N2. The second end N2 of the arcuate slot 54 functions tolimit the travel of the arms 40 to the prime-clear position.

The air cylinder 58 is selected or designed such that it can toleratethe overload applied thereto when if is extended either partially orfully depending on the position of the rod 50 or otherwise when theextending motion of the air cylinder 58 plunger is interrupted.

The first end N1 of the arcuate slot 54 functions to limit the travel ofthe arms 40 to the fully opened position where the engaging surface U ofeach arm 40 is flush with the plane P1. It should be understood by oneskilled in the art that the adjustment system 42 may be designed suchthat the shoulder screw 60 can be moved to the second end N2 by means ofthe rod 50 while the air cylinder 58 is fully retracted.

In the exemplary embodiment, the rod 50 is threaded at the right-handend as viewed in FIG. 9 and the end is inserted through a threaded block55 that is fixedly mounted to the frame 44. The position of the rod 50relative to the frame 44 can thereby be adjusted by cranking the rod 50.The rod 50 can be cranked manually or automatically, for example, with amotor including input controls.

In the exemplary embodiment, the air cylinder 58 has two positions. Theair cylinder 58 can be energized to move its plunger 57 from a fullyretracted position to an extended position and from an extended positionto a fully refracted position. As suggested above, the extension of theplunger 57 of the air cylinder 58 at its extended position, or at thetime the shoulder screw 60 reaches the second end N2, is variabledepending on the position of the rod 50 relative to the frame 44. Inother words, the energized air cylinder 58 extends its plunger 57 untilthe shoulder screw 60 comes into contact with the second end N2 of thearcuate slot 54, thereby moving the transition gate to the prime-clearposition to stop the flow of the articles. This feature is useful, forexample to quickly block the flow in the event of a jam or systemmalfunction, or at the end of a shift.

In alternative embodiments, a controllable mechanism that canincrementally extend from a first length to a second length may berotatably mounted to the frame 44 to provide the combined functionalityof the translatable rod 50 and the air cylinder 58.

It should be understood that, since all the air cylinders 58 areattached to the plate 48, the running position of each of the arms 40can be simultaneously adjusted. The air cylinders 58 can beindependently energized or simultaneously energized to rotate each arm40 to the prime-clear position. Furthermore, groups of air cylinders 58may be fired at once, such as when fewer than all lanes L are beingutilized in a given run.

Referring to FIGS. 1 and 13, once articles B exit the metering conveyor16, the articles B are grouped in the lanes L by the grouping conveyor18 before moving through the outfeed ends O of the lanes L onto thepocket conveyor 20. The lane guide 12 is arranged such that the outfeedends O of the lanes L extend across over the pocket conveyor 20. Thislane guide arrangement, as opposed to one where the downstream ends ofthe lane guides 32, 33 terminate at or are aligned along the conveyoredge E0, releases the articles exiting the outfeed ends O of the lanes Lat positions along the transverse width of the pocket conveyor 20. Thislane guide arrangement facilitates spacing the rows of articles Bexiting each lane L apart from one another such that the rows ofarticles B do not push against one another upon entering the pocketconveyor 20.

The outside lane guides 33, with the possible exception of the laneguide 33 that defines the lane L1, extend over the pocket conveyor 20 torelease the articles B from the lanes L at different positions along thewidth of the pocket conveyor 20, relative to the conveyor edge E0. Therelease positions of the lanes L along the width of the pocket conveyor20 are represented by notional lines E1, E2, E2. The notional lines E1,E2, E3 extend in parallel with the flow direction F and are defined byroll-off points at the downstream ends of the outside lane guides 33 ofthe lanes L1, L2, L3, respectively. The articles B1, B2, B3 that exiteach lane L1, L2, L3 are tangent to the notional lines E1, E2, E3,respectively. Accordingly, the center of each of the articles B1, B2, B3is offset from a respective one of the notional lines E1, E2, E3 by adistance that is substantially equal to a half of the diameter of thearticle B.

In the exemplary embodiment, downstream ends of the outside lane guides33 are aligned in a plane P2 that is at an angle A4 with respect to theconveyor side edge E0. Consequently, the notional lines E1, E2, E3 areconsistently spaced one to the next by a spacing distance K and adjacentrows of articles B1, B2, B3 are consistently spaced apart by a gap J. Itshould be noted that, since the move-off points are aligned in a plane,the spacing distances K are substantially equal.

It should be recognized that the gap J between the rows of the articlesB is substantially the difference between the spacing distance K and thediameter D of the articles B. Controlling the spacing K and/or the gap Jis beneficial, for example, to reduce instability as articles B arepushed by a pusher device from the pocket conveyor 20 into cartonsand/or to facilitate inserting dividers or partitions info the gaps J.

The angle A4 can be selected based en the diameter of the articles B ina particular run and a desired gap J between the rows of the articles Bsince, in this example arrangement the angle A4 determines the positionof notional lines E1, E2, E3 along the width W3 of the pocket conveyor20. The width W3 of the pocket conveyor 20 is defined between theconveyor side edges E0, E4.

Referring to FIG. 12, a lane extension 70 is slidably attached ortelescopingly connected at the outfeed end O of the associated lane Land is extendable or retractable to, in effect, modify the substantiallength of the respective outside lane guide 33. The lane extension 70slides in the direction of the arrow Z.

In the exemplary embodiment, the lane extension 70 is disposed betweenan outside lane guide 33 of a lane L and an inside lane guide 32 of anadjacent lane L. A support plate 80 is fixed between the lane guides 32,33 and bolts 82 extend through apertures in the support plate 80. Thelane extension 70 can include a slot (not shown) and an anchor plate(not shown). The bolts 82 extend through the slot and into threadedapertures (not shown) in the anchor plate. This arrangement is similarto that of the guide bar assembly 21. The bolts 82 can tighten the laneextension 70 between the anchor plate and the support plate 80 to fixthe position of the lane extension 70.

Thus, the lane extension 70 can be fixed at an extended length to act asan extension of the vertical contacting surface of the outside laneguide 33. The vertical contacting surface of the lane extension 70 andthe vertical contact surface of the outside lane guide 33 aresubstantially coplanar. When lane extensions 70 are extended, thenotional lines E1, E2, E3 of the corresponding lanes L are defined byroll-off points at the downstream end of the lane extensions 70. Thus,the lane extensions 70 facilitate controlling the positions of the rowsof articles B1, B2, B3 along the width of the pocket conveyor 20.

An exemplary method of positioning lane extensions to control theposition of rows of articles B along the width W3 of the pocket conveyor20 is now described. Referring to FIGS. 13 and 14, lane extensions 70that correspond to lanes L2, L3 are extended to change the positions ofthe notional lines E2, E3. In the exemplary method, the lane extension70 that corresponds to the lane L1 is not extended such that theposition of the notional line E1 remains adjacent to the conveyor edgeE0. A printed or engraved scale or other means for indicating theoptimal extension of each lane extension 70 may be provided.

Referring to FIG. 14, lane extensions 70 are arranged such that themove-off point of the outside lane guide 33 of the lane L1 and themove-off points of the lane extensions 70 are aligned in a plane P3 thatis at an angle A5 with respect to the conveyor side edge E0. Byarranging the lane extensions 70 in this manner, the gaps J, spacingdistances K, and positions of the notional lines E2, E3 each change withrespect to the absence of lane extensions 70 illustrated in FIG. 13, butin a manner that is proportional to the change in the angles A4, A5.Extending the lane extensions 70 increases the spacing distance Kbetween the adjacent notional lines E1, E2, E3 and the notional linesE2, E3 are positioned further from the notional line E1. Thus, forexample, if articles of the same diameter were run through each of thelane assemblies 12 illustrated in FIGS. 13 and 14, the rows of articlesB exiting the lanes L of the lane assembly illustrated in FIG. 14 wouldhave larger gaps J therebetween than the rows of articles B exiting thelane L of the lane assembly illustrated in FIG. 13.

In certain embodiments, the angle A5 may be ninety degrees, such thatthe plane P3 is perpendicular to the conveyor edge E0, or even greaterthan ninety degrees. More generally described, the angle A5 may beselected according to the diameter of the articles B and according to adesired gap J between the article rows.

If should be understood that the arrangement of the lane extensions 70and the degree of extension of each lane extension 70 are not limited tothose described above. Rather, each lane extension 70 may extend anydesired distance to properly adjust the gap J between rows of articles Bor to control the spacing distance K between or position of notionallines E1, E2, E3, for example, so that articles of different diametersmay form a group to be loaded into the same carton.

Referring to FIGS. 15 and 16, alternative arrangements of laneextensions 70 are shown. FIG. 15 shows an arrangement wherein laneextensions 70 reduce the spacing K and increase the distance between theconveyor edge E0 and the notional line E1. The move-off points of thelane extensions 70 are aligned in the plane P3, which defines an angleA5 with respect to the conveyor edge E0. The angle A5 is less than theangle A4.

FIG. 16 shows an arrangement wherein lane extensions 70 areproportionally, rather than incrementally, extended to increase thedistance between the conveyor edge E0 and the notional lines E1, E2, E3so as to maintain the original spacing distance K. The lane extensions70 extend a distance Y such that the move off points thereof are alignedin a plane P3, which is parallel to the plane P2.

Referring to FIG. 1, sensors or an operator may detect certainconditions and supply an input to the programmable logic controller(PLC) 41 to produce a desired response from the adjustment system 42.For example, the sensors R or an operator may detect that there are nomore cartons in the hopper, that there is a jam, or that an article Bhas fallen over. In response, the PLC 41 or the operator may supplyinputs that include a stop command, which energizes the air cylinders 58simultaneously or sequentially. The air cylinders 58 may energizesimultaneously if continuing would exacerbate a problem, or the aircylinders 58 may energize sequentially or simultaneously so that thelast articles in that run are properly loaded. In other instances, theair cylinders 58 may be energized individually, for example, to clear orempty the lanes L individually.

In the exemplary embodiment, the adjustable guide bars 34, gates 36, andlane extensions 70 can each be adjusted manually. To facilitate manualadjustment of each element, a scale is attached or adjacent to eachelement. For example, a measurement scale may be attached to the uppersurface of the lane extensions 70, and measurement scales may beattached to the lane assembly to extend above the adjustable guide bars34 and gates 36.

In an alternative embodiment, a controllable adjustment system ordevice, such as a pneumatic device, may be incorporated for the laneextensions 70 and the adjustable guide bar 34. Further, the adjustmentsystem for the lane extensions 70 and adjustable guide bar 34, a motorused to drive the threaded rod 50 of the adjustment system 42, and theair cylinders 58 may be controlled synchronously by the PLC 41, asdescribed in further detail below. In other words, the position of theplate 48 relative to the frame 44, the offset distance S of eachadjustable guide bar 34, the angular position of the engaging surface Uof each transition gate 36, and the extension of each lane extension 70may be adjusted synchronously based on an article diameter D and adesired gap J. For example, referring to FIG. 1, for a desired articlediameter D and a desired gap J between articles, the sensors R detectthe current position of each element. The sensors R relay theinformation to the PLC 41, which controls the adjustment systems andmechanisms to change the position of each adjustable guide bar 34, eachtransition gate 36, and each lane extension 70.

The methods are performed according to one or more user-created logicprograms stored on a computer readable medium and executed by the PLC41. The PLC 41 may be programmed directly, or the logic programs may bedownloaded or relayed from a computer (not shown). The PLC 41 has eithermodular or integral input/output circuitry that monitors the status offield connected sensor inputs and controls attached output actuators,including devices such as motor starters, solenoids, pilotlights/displays, drives, vacuum valves, and the like (not shown)according to the programs stored in the random-access (RAM) portion ofmemory. A system bus couples memory, sensor R inputs, and outputactuators to the PLC 41. If the PLC 41 receives programming from acomputer, the computer typically further includes additionalcomputer-readable media, such as low speed storage, such as a hard diskdrive or a magnetic disk drive, and the like, to read from or write to aremovable disk, and an optical disk drive for reading a CD-ROM disk orto read from or write to other optical media. The hard disk drive,magnetic disk drive, and optical disk drive include a hard disk driveinterface, a magnetic disk drive interface, and an optical driveinterface, respectively (not shown), for coupling the drives to thesystem bus. The drives and their associated computer-readable mediaprovide nonvolatile storage for the computer. Although the descriptionof computer-readable medium above refers to a hard disk, a portable USBdrive, a removable magnetic disk, a CD-ROM disk, ether types or mediareadable by a computer, such as magnetic cassettes, flash memory cards,digital video disks, Bernoulli cartridges, and the like, can also beused.

A number of program modules can be stored in the drives and in the RAMportion of memory, including an operating system, one or moreapplication programs, a shared code library, and a browser programmodule. A user may enter commands and information into the computerthrough a human/machine interface (HMI), such as but not limited to akeyboard and pointing device, such as a mouse. The HMI may incorporateother input/output devices such as a microphone, joystick, scanner,pushbuttons, LEDs, and the like. These and other input/output devicesmay be connected to the PLC 41 or the processing unit of the computerthrough a serial port interface coupled to the system bus, but can beconnected by other interfaces, such as a universal serial bus (USB) (notshown). The input/output devices include a monitor or other type ofdisplay device connected to the system bus via an interface, such as avideo adapter. In addition to the monitor, computers typically includeother peripheral output devices, such as speakers or printers.

The above-described embodiments are merely exemplary illustrations ofimplementations set forth for a clear understanding of the principles ofthe invention. Variations, modifications, and combinations may be madeto the above-described embodiments without departing from the scope ofthe claims. All such variations, modifications, and combinations areincluded herein by the scope of this disclosure and the followingclaims.

1. A packaging machine (10), comprising: a plurality of substantiallyparallel lanes (L) each for guiding articles (B) from an infeed end toan outfeed end thereof, said lanes (L) being defined with respect to oneanother by an inside lane guide (32) and an outside lane guide (33); anda lane extension (70) telescopingly mounted at the outfeed end of eachof said lanes (L), wherein each said lane extension (70) is selectivelyextendable and retractable to modify the length of said outside laneguide (33).
 2. The packaging machine of claim 1, further comprising apocket conveyor (20) for receiving articles (B) exiting said lanes (L);wherein: said articles (B) are deposited onto said pocket conveyor (20);and each said lane extension is capable of extending above said pocketconveyor (20) such that the degree of extension of each said laneextension (70) controls the position at which said articles (B) aredeposited.
 3. The packaging machine of claim 2, wherein said pocketconveyor (20) travels in a direction of flow (F) and said lanes (L) areangled with respect to said direction of flow (F).
 4. The packagingmachine of claim 1, wherein each said lane extension (70) isindependently extendable.
 5. The packaging machine of claim 1, furthercomprising electromechanical means for automatically adjusting theextension of said lane extensions (70).
 6. The packaging machine ofclaim 5, wherein all of said lane extensions (70) are synchronouslyextendable.
 7. A method of arranging articles (B) on a conveyor (20)that drives the articles (B) in a direction of flow (F), comprising:providing a plurality of substantially parallel lanes (L) each forguiding articles (B) from an infeed end to an outfeed end thereof, saidlanes (L) being defined with respect to one another by an inside laneguide (32) and an outside lane guide (33), and said lanes (L) beingangled with respect to said direction of flow (F); for each of saidlanes (L), selectively controlling the degree of extension over theconveyor (20) of a lane extension (70) that is telescopingly mounted atthe outfeed end of said each of said lanes (L), thereby modifying thelength of said outside lane guide (33); and wherein said degree ofextension is selected according to the desired position of said articles(B) on said conveyor (20).
 8. The method of claim 7, further comprising:depositing said articles (B) on the conveyor (20) in a matrix-likearrangement having a plurality of rows each defined by articles (B)exiting a single lane; and selecting the degree of extension of each ofsaid lanes (L) to control the distance between adjacent ones of saidrows of articles (B).
 9. The method of claim 7, further comprisingselecting the degree of extension of each said lanes (L) according tothe diameter of each of said articles (B).